2025 Triumph Daytona 660 problems, complaints & recalls
Most-reported problem areas: Engine And Engine Cooling (2) · Engine (1)
Safety recalls (1)
Engine And Engine Cooling:engine:oil/Lubrication 2025-08-19 · campaign 25V531000 · 1,929 vehicles
Defect: Triumph Motorcycles America, Ltd. (Triumph) is recalling certain 2024-2025 Daytona 660 motorcycles. The engine may fail due to internal damage from a disruption of oil flow.
Risk: Engine failure increases the risk of a crash.
Fix: Dealers will increase the engine oil capacity and install a redesigned dipstick, free of charge. Owner notification letters were mailed September 10, 2025. Owners may contact Triumph customer service at 1-678-854-2010. Triumph's number for this recall is SRAN 640.
Service bulletins (49)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Electrical System 2026-09-22 · COM2_35786 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of daignostic software and dealers should begin using it immediately.
Electrical System 2026-07-14 · COM1-35109 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of triumph diagnostic tool 2026-07 and dealers should begin using it immediately.
Electrical System 2026-06-23 · COM2 - 34886 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of triumph diagnostic tool 2026-06.1 and dealers should begin using it immediately.
Electrical System 2026-05-19 · COM6 - 34491 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of triumph diagnostic tool version 2026-06 and dealers should begin using it immediately.
Unknown Or Other 2026-05-19 · COM5 - 34490 · Service Bulletin/Repair Instructions
dealer notice announcing the availability of technical bulletin 264.
Unknown Or Other 2026-05-18 · TB264 · Service Bulletin/Repair Instructions
technical bulletin 264 provides instructions that relates to: triumph diagnostic tool - new motorcycle connection and diagnostics workflow, triumph diagnostic tool - end of support for microsoft windows 10.
Showing the 6 most recent of 49 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-09-25 · Engine“the engine experienced catastrophic failure while riding the motorcycle at highway speeds - loss of power, a clicking noise, and then the engine died completely. rider had to pull to the side of the freeway and coast to a safe location, engine would not restart. motorcycle was then towed to the dealership who has evaluated the motorcycle and damage…”
2026-04-27 · Engine And Engine Cooling“the contact owns a 2025 triumph daytona 660. the contact received notification of nhtsa campaign number: 25v531000 (engine and engine cooling); however, the part to do the recall repair was not yet available. the local dealer was contacted, but the vehicle was not repaired. the contact stated that the manufacturer had exceeded a reasonable amount o…”
2025-09-16 · Engine And Engine Cooling · 4,163 mi“the contact owns a 2025 triumph daytona 660. the contact stated that while driving 70 mph, the vehicle experienced a loss of automotive power. there was no warning light illuminated. the contact pulled over, and the vehicle was towed to a local dealer where it was diagnosed, and the contact was informed that the failure could not be duplicated. the…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.